Publication

Application

Priority

US 90510597 A 19970801

Abstract (en)

[origin: EP0895339A2] For use with a power factor correction circuit (120), a current mode controller (140), to achieve power factor correction thereof. In one embodiment, the controller (140) includes: (1) a modulator (143 to 150, 155), coupled to a switch in the power factor correction circuit (120), that senses an electrical characteristic and a current passing through the power factor correction circuit and provides, in response thereto, a control signal to the switch and (2) a compensation circuit (141, 142), coupled to an input of the power factor correction circuit (120), that provides a compensation signal to the modulator that is a function of a rectified line voltage provided to the input of the power factor correction circuit. The compensation signal causes the modulator to modify the control signal to reduce a total harmonic distortion (THD) of the power factor correction circuit. <IMAGE>